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F13 Copycat vs. Frančula XIII

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Projection No. 1:

Projection No. 2:

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  F13 Copycat Frančula XIII
Creator Tobias Jung (1941 / 2020) Nedjelko Frančula (1971)
Group Lenticular Lenticular
Property Compromise Compromise
Other Names
  • Wagner vii@60-77-60-45-170
Remarks Wagner VII variant, configuration 60-77-60-45-170 (using the Böhm notation, see Umbeziffern – The Wagner Transformation Method.

Experimental, a Frančula XIII copycat, with bit less areal inflation.

Briefly introduced in my blog.
A Wanger IX variant, derived by Umbeziffern from the equatorial azimuthal equidistant projection.), minimized distortion by application of the Airy-Kavrayskiy criterion.
For more information, refer to my blogpost The Frančula Projections or Frančula’s original paper Die vorteilhaftesten Abbildungen in der Atlaskartographie (German).
recommended comparisons Frančula XIII F13 Copycat
This pairing is among the list of recommended pairings – but why?
The F13 Copycat deliberately approaches certain properties of the Frančula XIII (aspect ratio, length and curvature of the pole line) but the distribution of meridians and parallels is different.

1. Comparison: Physical Map – scaled to fit

F13 Copycat
F13 Copycat
Frančula XIII
Frančula XIII

2. Comparison: Silhouette Map – scaled to fit

Click on projection’s name to hide it
Grey areas: Superimposition of projections
F13 Copycat Silhouette Map
Frančula XIII Silhouette Map

3. Comparison: Tissot Indicatrix, 30° – scaled to fit

F13 Copycat
F13 Copycat Tissot Indicatrix
Frančula XIII
Frančula XIII Tissot Indicatrix

4. Comparison: Physical Map – scaled to same width

F13 Copycat
F13 Copycat
Frančula XIII
Frančula XIII

5. Comparison: Silhouette Map – scaled to same width

Click on projection’s name to hide it
Grey areas: Superimposition of projections
F13 Copycat Silhouette Map
Frančula XIII Silhouette Map

6. Comparison: Tissot Indicatrix, 30° – scaled to same width

F13 Copycat
F13 Copycat Tissot Indicatrix
Frančula XIII
Frančula XIII Tissot Indicatrix

7. Comparison: Tissot Indicatrix, 15° – scaled to fit

F13 Copycat
F13 Copycat Tissot Indicatrix
Frančula XIII
Frančula XIII Tissot Indicatrix

8. Comparison: Tissot Indicatrix, 15° – scaled to same width

F13 Copycat
F13 Copycat Tissot Indicatrix
Frančula XIII
Frančula XIII Tissot Indicatrix
 

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